Oscillation generator



D 22, 1931. R. GOLDSCHMIDT 1 837,903

OSCILLATION GENERATOR Filed June 20, 1928 Inventor Robert: Goldschmidt, by 96 His Attorney.

Patented Dec. 22, 1931 umrsn STATfijgg harem OFFICE ROBERT-GOLDSCHMIDT, OF BERLIN-KARLSHORST, GERMANY, ASSIGNOR T GENERAL ELECTRIC COIVIPANY, A CORPORATION OF NEW YORK OSGILLATION GENERATOR Application filed June 20, 1928, Serial No. 286,946, and in Germany July 7, 1927.

My invention relates to electron discharge oscillation generators and more particularly to the winding systems thereof. It has for its purpose to provide an oscillation generator which is particularly adapted for use in connection with delicate measuring. devices, bridges and the like.

More particularly my invention has for its purpose to provide an electron discharge oscillation generator in which the potential or field distribution in the load winding is symmetrical with reference to the center of the winding system.

The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims. My invention itself, however, both as to its organization and method of operation, together with further objects and advantages thereof may best be understood by reference to the following description taken in connection with the accompanying drawings in which Fig. 1 represents a conventional circuit of an oscillation generator of the type to which my invention relates, and in which Figs. 2 to 7 inclusive illustrate the construction and arrangement of the windings thereof.

Referring to Fig. 1 of the drawings, 1 represents an electron discharge device having the usual cathode, anode and grid together with a grid winding 2, which is connected between the grid and cathode, and anode winding 3 which is connected between the anode and the cathode, and an output, or load winding 4, all of which windings are inductively related. 5 represents a condenser which is connected in shunt with the winding 3 and which together therewith comprises the oscillatory circuit of the generator.

The windings 2, 3 and 4 may be assembled in the manner shown in Fig. 2. It will be seen that each of the windings are of the cylindrical type and that they are arranged in parallel spaced relation, and further that the load winding is divided into sections which are disposed upon opposite sides of the grid and anode windings, and that they are arranged symmetrically with reference thereto, the inner terminals of the different sections of the winding 4 being connected by means of a conductor 6.

\Vhile advantages result from the use of windings arranged in accordance with Fig. 2 it is preferable that the windings be assembled in the manner shown in Fig. 3. In this figure it will be seen that not only is the load winding divided into sections but also the grid and anode windings are likewise divided into sections, each of these sections comprising coils of the cylindrical typefthe sections of each winding being symmetrically disposed upon opposite sides of a plane 7 extending parallel with the coils and which may be designated as the center of the windings. The inner terminals of each of the anode, grid and load windings are connected together by conductors 8, 9 and 10 respectively. If desired, however, either of the grid or anode windings may comprise a single coil, the other windings being disposed symmetrically with reference thereto. The operation of the system shown in Fig. 3 is improved if the symmetry of the arrangement is increased by winding the coils of each winding in opposite sense with reference to each other in the manner shown in Fig. 6. The effect of stray fields is reduced by this arrangement.

In Figs. 4 and 5 of the drawings respectively I have shown a side elevation and perspective view of the winding assembly.

It will be seen that each of the sections of the different windings is provided with an individual base 11, which is adapted for slidable engagement with a recessed portion of a common support 12. This arrangement provides a convenient means whereby the space relation of the coils may be adjusted in order to compensate for minor unevenness in the symmetry which may occur resulting from the assembly as shown in Fig. 3, thereby producing a more symmetrical field and potential distribution in the load coil.

The arrangement of the windings within the coils and particularly that of the load coil is shown in Fig. 6. In order to prevent 'outside disturbances from affecting the field or potential distribution in the load winding, 

